The kingdom of Queen Quintessence in the famous satirical romance of Rabelais called the History of Gargantua and Pantagruel. Pantagruel and his companions went thither in search of the Holy Bottle. It may be called the city of speculative science.

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The word is used to express the realisation of a beau ideal. Lovers have preconceived notions of human perfections, and imagine that they see the realities in the person beloved, who is the entelechy of their beau ideal.